Automatic casing-perforator for deep wells.



Patented May 22, |900. E. A. HABDISON.

AUTOMATIC CASING PERFORATOR FUR DEEP WELLS.

(Applicazion medAug. 31, 1899.',

. {Nc Model.)

'V 7 UNITED STATES.`

PATENT` l EEICE,

vEDWIN A. IIARDIs'oN, oEAsA-NTA IAULA, CALIFORNIA, AssIeNon or. oNE- IIALE To WALLACE LIIAEnIsoN, on sAIIIn'rIAx en j AUTOMATIC oAsiNe-PERFORATOR Fon Desi watts.

SPECIFICATION-forming part ef Letters Patent No. 650,318, dated May 22, 1900,

" 'ApplicationaieaAugnttsiyleee. Serin 110.729.116. 'da man.)

To all whom, it 11m/ 7] concern: Beit known that I, EDWIN AQ HARDISON, residing at Santa Paula, in thecounty otVentura and State of California, have invented a new and usefulAutonaticCasing-Perforator for Deep Wells o'f which the followingis a specification. i Myinvention relates 'to casinglperforators with which to perforate the casin'gs in deep wells it is desirable to perforat'ethe well-casbottom-of the wellat Whichthe oil or water that is' to say, it often occurs in sinking a well that the Same will passpthrough one or-Inore foil or water bearing strat-a, and inthe case of v oil-wells itl-is necessary to perfcrate' the ving at-the-oil stratum or strata between the top and bottom of the Well and to leavethe casingv intactat the Water-bearing strata, thusI to prevent the water fromv entering the casl ing and at thesame time toallow the oil to 5 enter the casing'. In the case 'o t Artesian or other bored wells for snpplying'water itis necessary to perforate the casin g at the water-- bearing,r strata in order to allow the water from such strata to ow into the casing, thus o to Inakethewell afford the largest possible supply of water. The object of my invention is to provide a casin g-perforator which' can be lowered to any View of the perforator in awell and with partsV in position for perforating the casing. In this 5 View a portion of one bar of the slide is broken to show'theotherbar. Fig. 3 is a View of the casing-perforator in'the well and with parts in position for withdrawing from the casing. In this view the body is shown in vertical mido section except at the top. Fig. i 1s a sectional wells-such, for instance, as oil-wells' and Artesian wellsfor supplying'water.- I n such bearing strata, as'the case 'may be, isfou iid-1A indicates the casing-performer `Jod y, provided with a slideway (t, which is parallel with the axis ot' the body, and also provided 'with a'guideway a', which is oblique to the 55 slideway a. YThe body is also provided at its'- 4lower end with a latch-'withholding catch u," and with a l atclI- catch a".

B indicates a wheel-carrier slide to slidein the slidewayol and providedat its lower end 6o with a friction device I) to engage the easing,r

to temporarily hold the slide stationary with relation to the body of the perforator, said in g at the point or points between the-top and l guideway a.

YC indicates the perforator-wheel provided with an axle c ot two diameters, the outer ends of the axle beingsmallerthan the por-.f tions close to the wheel. llhe guideway d is 7o wider than the transverse slot b", and the axle isset with its larger diameter in the guideway and with its smaller diameter in the transverse slot.

l) indicates a latch pivoted to the slide B 75 and provided at its upper end with a retain- Y ing-linger d and with a hook or catch d'.

In practical operation when the tool is to be'lowered into the casing the frictiony device Il) will be inserted into the casing and the tool 8o lowered somewhat,- thus causing the body to descend'along the slide B, and 'at the same time the latch D is held to cause the finger d to engage the latch-holdingfcatch c", so that the latch isheld'out of Vits catching po- 85 sition. E indicates avspring toengage the latch and to throw the latch t'o catch upon the catch zr'". As the tool is lowered down the casing the friction of the device ZJ holdsvr the slide up, with the latch-finger d in' engage- 9c Inent witl the latch-retaineru".l 'When the tool has reached Vthe desired place in the ca sing, the body A will be ldrawn up and the -weight ofv the slide and the frictiondevice I) ving the body-of thetool, andas the body of the tool rises the wheel @being acted upon by the wall of the guidewayd', is driven to one side, thus toproject'the spurs of the perl'orating-wheel*outward to perforate the cas- Ioo ing, as indicated in' Fig. 2. 'lhe-bodyof 'the pla-noi.'thecasing-perforatori n linc L4, lfigdyi tool is then drawn up and thc points o|` thewheel pierce thercasing at intervals until the line of perforaiio'n has been made to the proper height. Then the tool will be lowered a short distance and the friction device b will temporarily hold the slide, thus allowing the body tocome down and to engage the oblique face nl" of the latch, thus throwing the latch back until it has entered the body of the tool far enough to allow the spring E to throw the latch to bring the shoulder or hook d over the shoulder or catch ct'", which securely locks the slide to the body of the perforator, as indicated in Fig. 3. Then the tool may be drawn upward out-of the casing, and when it has reached the top the latch may be thrown back and the slide allowed to fall to withdraw the latch from the body and n.to allow the iinger d to be again brought into the position shown in Fig. 1.

By preference the friction device is fixed vat the lower` end of a rod l, which is fastened to the carrier or slide B by a pin 2 and passes up into the body A. The latch is pivoted to such rod, which is practically a part of the slide or carrier ll.

5 indicates antifriction-rollers to engage the casing to hold the body against the thrust-of the perforator. i f

Now, having described my invention, what I claim as new, and desirey to secure by Letters Patent, is-

1. A casing-perforator comprising a body provided with an oblique way; a perforatingwheel having its axle mounted to run in such way; a sliding Wheel-carrier in which the axle of the wheel is journaled to rotate; a friction device connected with the wheel-carrier to engage the casing to temporarily hold the wheel-carrier stationary With relation to the body of the perforator; a latch pivoted to the Wheel-carrier to hold the wheel-carrier in its elevated position with relation to the body; and means for temporarily holding` the latch ont of engagement with its catch on the body of the perforator.

2. A casing-perforator comprisinga body provided with a slid eway parallel with its axis and with a guideway oblique to the axis of the slideway, and also provided at its lower end with a catch for the latch and with a latch holdin g catch ;y a perforating wheel carrier to slide in the slideway and provided with a transverse slot; a perforatingwheel provided with an axle to run in the guideway and slot; a friction device connected with, the carrier to engage the casing to hold the carrier stationary with relation to the bodyof the perforator; and a latch pivoted to the carrier and provided with a finger to catch the latch-locking catch and provided with a hook to hook upon the latch-4 catch of the body.

3. In 'a casing-perforator, the combination with a body provided with Match-withholding the latch-retaining catch.

EDWIN A. HARDISON.

Witnesses:

JAMES R. TOWNSEND, FRANCIS M. ToWNsEND. 

